四边形有四条直的边,有四个角.______.(判断对错)
四边形有四条直的边,有四个角,说法正确,
故答案为:√.
— What do you think about _________ dress in the shop window?
— Oh, it’s beautiful. You may give it to Linda as _________ birthday present.
A.a; a
B.the; a
C.a; the
D.the; the
制冷系统在正常运行工况条件下,冷媒水突然中断供应,应首先()。